has been和had been 有什么区别?能说详细一点吗,包括用法和典型一点的句子……

英语,has been和 had been had been 和 has/have been的区别是什么? 初中英语语法has been和had been的区别 there has been a time和there had been a time有什么区别? 请问HAS BEEN和 HAVE BEEN HAD BEEN的用法以及分别加DONE后的用法请问HAD BEEN 单复数用法有区别吗 had been doing 和had been done有什么差别 had been doing 和had been done有什么差别? 关于had has等英语语法has been V+ing和had been V+ing的区别. 关于时态的问题have beenhave been 和have had been有什么区别?原句是这样的：I've heard has been good.有have也有has has been waited 和has been waiting 有什么区别? 英语语法的一些问题has been explained 和 had been explained 它们两个有什么区别吗? have been / has been / had been 的区别 has been / have been /had been ………… had been和have been有什么区别?请举例 had been,has been,has,had 后面加过去分词都是怎么用的?【以及和was,is有什么区别?】 请问have been 和has been有什么区别 have has had或 having +been 的区别和用法 has/had been gone和has had been done的区别是什么啊 我要疯了.做题总错